Chicago police investigating vandalism after firework explosion in NW Side mailbox

CHICAGO (WLS) -- Chicago Police are working to figure out who put lit fireworks inside a mailbox on the city's Northwest Side.

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The incident happened around 6 p.m. near North Elston Avenue and West Belle Plaine Avenue, police said.

No one was hurt but it appears some mail was damaged.

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The person responsible could face federal charges for vandalizing the mailbox, police said.